CEA 4001 - Page 29

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29

-

the

node

or

pipe

reference

scheme

used

to

identify

pipes,

junctions,

sprinkler

heads

and

fittings

which

need

hydraulic

consideration;

-

the

position

of

the

hydraulically

most

unfavourable

area

of

operation;

-

the

position

of

the

hydraulically

most

favourable

area

of

operation;

-

the

four

sprinklers

upon

which

the

design

density

is

based;

-

the

height

above

datum

of

each

point

f

identified

pressure

value;

e)

for

each

operating

sprinkler:

1)

the

sprinkler

node

or

reference

number;

2)

the

nominal

K

factor;

3)

the

flow

through

the

sprinkler

in

litres

per

minute;

4)

the

inlet

pressure

to

the

sprinkler

or

sprinkler

assembly

in

bar;

f)

for

each

hydraulically

significant

pipe:

1)

pipe

node

or

other

reference;

2)

nominal

bore

in

millimetres;

3)

the

pipe

constant

for

type

and

condition

(see

G1.1.)

(e.g.

Hazen

Williams

constant);

4)

flow

in

litres

per

minute;

5)

velocity

in

metres

per

second;

6)

length

in

metres;

7)

numbers,

types

and

equivalent

lengths

of

fittings;

8)

static

head

change

in

metres;

9)

pressures

at

inlet

and

outlet

in

bar;

10)

friction

loss

in

bar;

11)

indication

of

flow

direction.

3.4.4 Water supply

3.4.4.1 Water supply drawings

The

drawings

shall

show

water

supplies

and

pipework

there from

up

to

the

installation

control

valves.

The drawings

shall

be

on

an

indicated

scale

of

not

less

than

1:

100.

A

key

to

the

symbols

shall

be

included.

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